Adding upstream version 2.1.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.travis/install.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -ex
+
+if [[ "$(uname -s)" == 'Darwin' ]]; then
+    sw_vers
+
+    git clone --depth 1 https://github.com/pyenv/pyenv ~/.pyenv
+    export PYENV_ROOT="$HOME/.pyenv"
+    export PATH="$PYENV_ROOT/bin:$PATH"
+    eval "$(pyenv init -)"
+
+    case "${TOXENV}" in
+        py36)
+            pyenv install 3.6.1
+            pyenv global 3.6.1
+            ;;
+    esac
+    pyenv rehash
+fi
+
+pip install virtualenv
+python -m virtualenv ~/.venv
+source ~/.venv/bin/activate
+pip install tox